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Matthieu Baerts (NGI0) 284a221f8f sctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy 
commit 6259d2484d upstream.

As mentioned in a previous commit of this series, using the 'net'
structure via 'current' is not recommended for different reasons:

- Inconsistency: getting info from the reader's/writer's netns vs only
  from the opener's netns.

- current->nsproxy can be NULL in some cases, resulting in an 'Oops'
  (null-ptr-deref), e.g. when the current task is exiting, as spotted by
  syzbot [1] using acct(2).

The 'net' structure can be obtained from the table->data using
container_of().

Note that table->data could also be used directly, as this is the only
member needed from the 'net' structure, but that would increase the size
of this fix, to use '*data' everywhere 'net->sctp.probe_interval' is
used.

Fixes: d1e462a7a5 ("sctp: add probe_interval in sysctl and sock/asoc/transport")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/67769ecb.050a0220.3a8527.003f.GAE@google.com [1]
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250108-net-sysctl-current-nsproxy-v1-8-5df34b2083e8@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-01-17 13:36:18 +01:00
..
6lowpan 6lowpan: Remove redundant initialisation. 2023-03-29 08:22:52 +01:00
9p 9p/xen: fix release of IRQ 2024-12-09 10:32:57 +01:00
802 net: 802: LLC+SNAP OID:PID lookup on start of skb data 2025-01-17 13:36:11 +01:00
8021q net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-17 12:02:07 +02:00
appletalk appletalk: Fix Use-After-Free in atalk_ioctl 2023-12-20 17:01:50 +01:00
atm atm: Fix Use-After-Free in do_vcc_ioctl 2023-12-20 17:01:48 +01:00
ax25 ax25: Replace kfree() in ax25_dev_free() with ax25_dev_put() 2024-06-21 14:38:14 +02:00
batman-adv batman-adv: Do not let TT changes list grows indefinitely 2024-12-19 18:11:27 +01:00
bluetooth Bluetooth: MGMT: Fix Add Device to responding before completing 2025-01-17 13:36:14 +01:00
bpf bpf, test_run: Fix LIVE_FRAME frame update after a page has been recycled 2024-11-08 16:28:19 +01:00
bpfilter net: Use umd_cleanup_helper() 2023-05-31 13:06:57 +02:00
bridge bridge: Handle error of rtnl_register_module(). 2024-10-17 15:24:29 +02:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can net: af_can: do not leave a dangling sk pointer in can_create() 2024-12-14 20:00:04 +01:00
ceph ceph: allocate sparse_ext map only for sparse reads 2025-01-02 10:32:00 +01:00
core ipvlan: Fix use-after-free in ipvlan_get_iflink(). 2025-01-17 13:36:13 +01:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp dccp: Fix memory leak in dccp_feat_change_recv 2024-12-14 19:59:36 +01:00
devlink devlink: fix port new reply cmd type 2024-03-26 18:20:11 -04:00
dns_resolver keys, dns: Fix size check of V1 server-list header 2024-01-25 15:35:41 -08:00
dsa net: dsa: fix netdev_priv() dereference before check on non-DSA netdevice events 2024-10-10 11:58:07 +02:00
ethernet ethernet: Add helper for assigning packet type when dest address does not match device address 2024-05-02 16:32:46 +02:00
ethtool ethtool: Fix wrong mod state in case of verbose and no_mask bitset 2024-12-14 19:59:39 +01:00
handshake net/handshake: Fix handshake_req_destroy_test1 2024-02-23 09:24:50 +01:00
hsr net: hsr: avoid potential out-of-bound access in fill_frame_info() 2024-12-14 19:59:34 +01:00
ieee802154 net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() 2024-12-14 20:00:04 +01:00
ife net: sched: ife: fix potential use-after-free 2024-01-01 12:42:30 +00:00
ipv4 tcp: Annotate data-race around sk->sk_mark in tcp_v4_send_reset 2025-01-17 13:36:14 +01:00
ipv6 ila: serialize calls to nf_register_net_hooks() 2025-01-09 13:32:03 +01:00
iucv s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() 2024-12-09 10:32:33 +01:00
kcm kcm: Serialise kcm_sendmsg() for the same socket. 2024-08-29 17:33:46 +02:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp ipv6: introduce dst_rt6_info() helper 2024-12-14 19:59:35 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc net: llc: reset skb->transport_header 2025-01-09 13:32:01 +01:00
mac80211 wifi: mac80211: wake the queues in case of failure in resume 2025-01-09 13:32:03 +01:00
mac802154 mac802154: Fix potential RCU dereference issue in mac802154_scan_worker 2024-10-10 11:57:59 +02:00
mctp net: mctp: handle skb cleanup on sock_queue failures 2025-01-09 13:31:54 +01:00
mpls ipv6: introduce dst_rt6_info() helper 2024-12-14 19:59:35 +01:00
mptcp mptcp: sysctl: sched: avoid using current->nsproxy 2025-01-17 13:36:17 +01:00
ncsi net/ncsi: Fix the multi thread manner of NCSI driver 2024-06-21 14:38:14 +02:00
netfilter netfilter: conntrack: clamp maximum hashtable size to INT_MAX 2025-01-17 13:36:15 +01:00
netlabel calipso: fix memory leak in netlbl_calipso_add_pass() 2024-01-25 15:35:14 -08:00
netlink sock_diag: add module pointer to "struct sock_diag_handler" 2024-12-09 10:32:09 +01:00
netrom netrom: check buffer length before accessing it 2025-01-09 13:32:00 +01:00
nfc nfc: llcp: fix nfc_llcp_setsockopt() unsafe copies 2024-08-19 06:04:28 +02:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-05-17 12:02:02 +02:00
openvswitch net: ovs: fix ovs_drop_reasons error 2024-08-29 17:33:50 +02:00
packet af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK 2025-01-09 13:32:02 +01:00
phonet phonet: Handle error of rtnl_register_module(). 2024-10-17 15:24:30 +02:00
psample psample: Require 'CAP_NET_ADMIN' when joining "packets" group 2023-12-13 18:45:10 +01:00
qrtr net: qrtr: Update packets cloning when broadcasting 2024-10-04 16:29:41 +02:00
rds net:rds: Fix possible deadlock in rds_message_put 2024-08-19 06:04:27 +02:00
rfkill net: rfkill: gpio: Add check for clk_enable() 2024-12-09 10:32:11 +01:00
rose net/rose: fix races in rose_kill_by_device() 2024-01-01 12:42:31 +00:00
rxrpc rxrpc: Improve setsockopt() handling of malformed user input 2024-12-09 10:32:35 +01:00
sched sched: sch_cake: add bounds checks to host bulk flow fairness counts 2025-01-17 13:36:15 +01:00
sctp sctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy 2025-01-17 13:36:18 +01:00
smc net/smc: check return value of sock_recvmsg when draining clc data 2024-12-27 13:58:47 +01:00
strparser strparser: pad sk_skb_cb to avoid straddling cachelines 2022-07-08 18:38:44 -07:00
sunrpc sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket 2024-12-09 10:33:00 +01:00
switchdev net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:35:06 +01:00
tipc tipc: fix NULL deref in cleanup_bearer() 2024-12-19 18:11:27 +01:00
tls tls: Fix tls_sw_sendmsg error handling 2025-01-17 13:36:13 +01:00
unix splice: do not checksum AF_UNIX sockets 2024-12-19 18:11:21 +01:00
vmw_vsock bpf, vsock: Invoke proto::close on close() 2024-12-14 19:59:47 +01:00
wireless wifi: cfg80211: sme: init n_channels before channels[] access 2024-12-19 18:11:27 +01:00
x25 net/x25: fix incorrect parameter validation in the x25_getsockopt() function 2024-03-26 18:19:41 -04:00
xdp xsk: fix OOB map writes when deleting elements 2024-12-14 19:59:57 +01:00
xfrm ipv6: introduce dst_rt6_info() helper 2024-12-14 19:59:35 +01:00
compat.c net/compat: Update msg_control_is_user when setting a kernel pointer 2023-04-14 11:09:27 +01:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile net/handshake: Create a NETLINK service for handling handshake requests 2023-04-19 18:48:48 -07:00
socket.c net: explicitly clear the sk pointer, when pf->create fails 2024-10-17 15:24:35 +02:00
sysctl_net.c sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:47:13 +02:00